| 年度 | 实际值 |
|---|---|
| 1992 | 12.5 |
| 1993 | |
| 1994 | |
| 1995 | 12.3 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 13.07 |
| 2000 | 124238 |
| 2001 | 123752 |
| 2002 | 11.4719 |
| 2003 | 11.4222 |
| 2004 | 11.4566 |
| 2005 | 12.4767 |
| 2006 | 12.5 |
| 2007 | 12.36 |
| 2008 | 12.41 |
| 2009 | 12.1673 |
| 2010 | 12.3538 |
| 2011 | 12.4051 |
| 2012 | 12.52 |
| 2013 | 12.93 |
| 2014 | 13.12 |
| 2015 | 12.04 |
| 2016 | 12.1 |